MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 e4826272c8040d809f0813cd2835821d40ae2744d13968d1860e62fae5e7ac37. While MalwareBazaar tries to identify whether the sample provided is malicious or not, there is no guarantee that a sample in MalwareBazaar is malicious.
Database Entry
QuasarRAT
Vendor detections: 16
| SHA256 hash: | e4826272c8040d809f0813cd2835821d40ae2744d13968d1860e62fae5e7ac37 |
|---|---|
| SHA3-384 hash: | f23a3cb76b98f947d9c5d735e0b6e048152682b2ef1263b32b2f4524fdd63c51277c4557b52224214ac8f8c818cd66af |
| SHA1 hash: | 96dc4e5dc2353b8488992294a48a4569a25ae908 |
| MD5 hash: | c123b58147122786baacc6961b3d2318 |
| humanhash: | earth-snake-tennis-michigan |
| File name: | Client-built.exe |
| Download: | download sample |
| Signature | QuasarRAT |
| File size: | 1'624'064 bytes |
| First seen: | 2025-05-14 21:44:09 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger) |
| ssdeep | 24576:CpL3MUH5v8S2eWBRwRR16zhHIPbcNK0KKm77yviUSQaZaOwI55l2S62r9lsUJBzd:CpXH5e7wR2EgKKm77LrwCB6AFJ |
| Threatray | 22 similar samples on MalwareBazaar |
| TLSH | T17C75F112B7F9820AE6BF1BBCA87355550B37F5039A3AC74E098C509D1EF73409A917A3 |
| TrID | 58.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 13.2% (.EXE) Microsoft Visual C++ compiled executable (generic) (16529/12/5) 8.4% (.EXE) Win64 Executable (generic) (10522/11/4) 5.2% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 4.0% (.EXE) Win16 NE executable (generic) (5038/12/1) |
| Magika | pebin |
| Reporter |  James_inthe_box |
| Tags: | exe QuasarRAT |
Intelligence
File Origin
# of uploads :
1
# of downloads :
629
Origin country :
USVendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Client-built.exe
Verdict:
Malicious activity
Analysis date:
2025-05-14 19:50:41 UTC
Tags:
auto-reg crypto-regex
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
Score:
99.9%
Tags:
vmdetect autorun quasar
Result
Verdict:
Malware
Maliciousness:
Behaviour
Searching for the window
Creating a window
Сreating synchronization primitives
Creating a file in the %AppData% subdirectories
Launching a process
Enabling the 'hidden' option for recently created files
Creating a process from a recently created file
Creating a file
Setting a keyboard event handler
Connection attempt to an infection source
Unauthorized injection to a recently created process
Query of malicious DNS domain
Enabling autorun by creating a file
Verdict:
Malicious
Threat level:
10/10
Confidence:
100%
Tags:
anti-vm anti-vm backnet base64 cmd cscript explorer fingerprint hacktool lolbin lolbin mshta netsh obfuscated packed packed packer_detected quasarrat rat reconnaissance remote runonce schtasks update
Verdict:
Malicious
Labled as:
Jalapeno.Generic
Verdict:
Malicious
Result
Threat name:
Quasar
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Signature
.NET source code contains potential unpacker
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Installs a global keyboard hook
Joe Sandbox ML detected suspicious sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sample uses string decryption to hide its real strings
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected Quasar RAT
Behaviour
Behavior Graph:
Score:
99%
Verdict:
Malware
File Type:
PE
Threat name:
ByteCode-MSIL.Hacktool.Aikaantivm
Status:
Malicious
First seen:
2025-05-14 19:50:42 UTC
File Type:
PE (.Net Exe)
Extracted files:
3
AV detection:
23 of 24 (95.83%)
Threat level:
1/5
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
quasarrat
Similar samples:
+ 12 additional samples on MalwareBazaar
Result
Malware family:
quasar
Score:
10/10
Tags:
family:quasar botnet:office04 spyware trojan
Behaviour
Scheduled Task/Job: Scheduled Task
Suspicious behavior: AddClipboardFormatListener
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Executes dropped EXE
Quasar RAT
Quasar family
Quasar payload
Malware Config
C2 Extraction:
alexnikolov-51855.portmap.io:51855
Verdict:
Malicious
Tags:
red_team_tool backdoor backnet rat quasar_rat Win.Malware.Generic-9883083-0
YARA:
HKTL_EXE_AlKhaser_Jul_01 MAL_BackNet_Nov18_1 MAL_QuasarRAT_May19_1 malware_windows_quasarrat
Unpacked files
SH256 hash:
e4826272c8040d809f0813cd2835821d40ae2744d13968d1860e62fae5e7ac37
MD5 hash:
c123b58147122786baacc6961b3d2318
SHA1 hash:
96dc4e5dc2353b8488992294a48a4569a25ae908
Detections:
QuasarRAT
Malware family:
QuasarRAT
Verdict:
Malicious
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
iSpy Keylogger
Score:
1.00
YARA Signatures
MalwareBazaar uses YARA rules from several public and non-public repositories, such as YARAhub and Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious process dumps they may create. Please note that only results from TLP:CLEAR rules are being displayed.
| Rule name: | Check_Dlls |
|---|
| Rule name: | Costura_Protobuf |
|---|---|
| Author: | @bartblaze |
| Description: | Identifies Costura and Protobuf in .NET assemblies, respectively for storing resources and (de)serialization. Seen together might indicate a suspect binary. |
| Rule name: | DebuggerCheck__API |
|---|---|
| Reference: | https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara |
| Rule name: | DebuggerCheck__QueryInfo |
|---|---|
| Reference: | https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara |
| Rule name: | DebuggerHiding__Thread |
|---|---|
| Reference: | https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara |
| Rule name: | Detect_PowerShell_Obfuscation |
|---|---|
| Author: | daniyyell |
| Description: | Detects obfuscated PowerShell commands commonly used in malicious scripts. |
| Rule name: | INDICATOR_EXE_Packed_Fody |
|---|---|
| Author: | ditekSHen |
| Description: | Detects executables manipulated with Fody |
| Rule name: | INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA |
|---|---|
| Author: | ditekSHen |
| Description: | Detects Windows executables referencing non-Windows User-Agents |
| Rule name: | INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL |
|---|---|
| Author: | ditekSHen |
| Description: | Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion |
| Rule name: | MAL_BackNet_Nov18_1 |
|---|---|
| Author: | Florian Roth (Nextron Systems) |
| Description: | Detects BackNet samples |
| Reference: | https://github.com/valsov/BackNet |
| Rule name: | MAL_BackNet_Nov18_1_RID2D6D |
|---|---|
| Author: | Florian Roth |
| Description: | Detects BackNet samples |
| Reference: | https://github.com/valsov/BackNet |
| Rule name: | MAL_QuasarRAT_May19_1 |
|---|---|
| Author: | Florian Roth (Nextron Systems) |
| Description: | Detects QuasarRAT malware |
| Reference: | https://blog.ensilo.com/uncovering-new-activity-by-apt10 |
| Rule name: | MAL_QuasarRAT_May19_1 |
|---|---|
| Description: | Detects QuasarRAT malware |
| Rule name: | MAL_QuasarRAT_May19_1_RID2E1E |
|---|---|
| Author: | Florian Roth |
| Description: | Detects QuasarRAT malware |
| Reference: | https://blog.ensilo.com/uncovering-new-activity-by-apt10 |
| Rule name: | Multifamily_RAT_Detection |
|---|---|
| Author: | Lucas Acha (http://www.lukeacha.com) |
| Description: | Generic Detection for multiple RAT families, PUPs, Packers and suspicious executables |
| Rule name: | NET |
|---|---|
| Author: | malware-lu |
| Rule name: | NETexecutableMicrosoft |
|---|---|
| Author: | malware-lu |
| Rule name: | pe_imphash |
|---|
| Rule name: | RANSOMWARE |
|---|---|
| Author: | ToroGuitar |
| Rule name: | Skystars_Malware_Imphash |
|---|---|
| Author: | Skystars LightDefender |
| Description: | imphash |
| Rule name: | Sus_Obf_Enc_Spoof_Hide_PE |
|---|---|
| Author: | XiAnzheng |
| Description: | Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP) |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
Malspam
Delivery method
Distributed via e-mail attachment
BLint
The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.
Findings
| ID | Title | Severity |
|---|---|---|
| CHECK_AUTHENTICODE | Missing Authenticode | high |
| CHECK_DLL_CHARACTERISTICS | Missing dll Security Characteristics (GUARD_CF) | high |
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